White House staff will reportedly be banned from using personal mobile phones while at work.

Chief of staff John Kelly issued the directive for security reasons, per Bloomberg News, despite some aides expressing concern that they'll be unable to contact or be contacted by family or friends in case of emergency.

The change in policy is not in response to leaks of sensitive information about the Trump administration to the press, one official told the news outlet.

Another source said too many devices were connected to the White House wireless network and personal cellphones weren't as secure as their work counterparts.

Staffers against the move say phones issued by the federal government don't have text message functionality, a popular way to communicate regarding personal matters during a busy day.

There have been conflicting media reports about the start date from which the prohibition will be enforced, ranging from Friday to next week.